'NCIS' Reaches 'Rare Air' with 200 Episodes

The cast of NCIS was soaring high during a recent set visit and with good reason -- the show has reached its 200th episode! ET was there as the stars popped champagne and spilled plot secrets.

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"I look at 200 episodes and it's certainly rare air," said Mark Harmon. "It's not a place that many get to be."

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Regardless of how extraordinary the accomplishment is, Pauley Perrette admitted that she's not surprised.

"The first time I read it I was like, 'Oh yeah, this is gonna be great,'" Pauley said. "I'm like the biggest NCIS fan. It's a great show. I watch the marathons. I'm a total NCIS addict."

In its ninth season, TV's number one prime-time drama has gone through an infinite amount of plot twists but it still has a few tricks up its sleeve.

"I think it's a really creative piece of writing by [showrunner] Gary Glasberg," Mark Harmon says of the 200th episode. "I think for people who follow the show that this'll be an episode that entertains in a lot of different ways. There'll be guest visits from many people who have passed through here over the last nine years."

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The 200th episode of NCIS airs tonight, February 7 on CBS.